Electric fan



FIG. 1 is a perspective front view,

FIG. 2 is a perspective rear view,

FIG. 3 a front view,

FIG. 4 a side view,

FIG. 5 a rear view,

FIG. 6 a top view; and,

FIG. 7 is a bottom view. 

The ornamental design for an electric fan, as shown and described. 